US11819834B2ActiveUtilityA1
Aluminophosphate molecular sieve SCM-18, its preparation and application thereof
Est. expiryOct 25, 2038(~12.3 yrs left)· nominal 20-yr term from priority
B01J 29/83B01J 20/0292B01J 37/04B01J 37/06B01J 37/082C01B 39/54C01P 2002/72C01P 2006/12C01P 2006/14C01B 37/04B01J 20/18B01J 20/28011B01J 20/28061B01J 20/28071B01J 20/3078B01J 20/3085B01J 20/02
46
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Cited by
22
References
20
Claims
Abstract
An aluminophosphate molecular sieve SCM-18 has a schematic chemical composition, expressed on a molar basis, of Al2O3.n P2O5, in which n represents a phosphorus to aluminum molar ratio, and is in a range of about 0.8-1.2. The aluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.
Claims
exact text as granted — not AI-modifiedThe invention claimed is:
1. An aluminophosphate molecular sieve having a schematic chemical composition of Al 2 O 3 ·nP 2 O 5 , expressed in molar ratio, wherein n represents a phosphorus to aluminum molar ratio, and is in a range of about 0.8 to about 1.2, and the molecular sieve has an X-ray diffraction pattern exhibiting a relative intensity profile as shown in the following table:
2 theta
Interplanar spacing
Relative intensity
(°)
(Å)
(I/I 0 ) × 100
8.20-8.60
10.27-10.77
VS
13.73-13.99
6.32-6.44
VS
16.16-16.41
5.39-5.48
W-M
16.36-16.61
5.33-5.41
W-M
21.34-21.58
4.11-4.16
W-M
21.66-21.91
4.05-4.10
M-S
24.04-24.32
3.66-3.70
W-M.
2. The aluminophosphate molecular sieve of claim 1 , wherein the molecular sieve has an X-ray diffraction pattern exhibiting a relative intensity profile shown in the following table:
2 theta
Interplanar spacing
Relative intensity
(°)
(Å)
(I/I 0 ) × 100
8.20-8.60
10.27-10.77
VS
13.73-13.99
6.32-6.44
VS
13.90-14.20
6.23-6.36
W-M
16.16-16.41
5.39-5.48
W-M
16.36-16.61
5.33-5.41
W-M
19.66-19.91
4.45-4.51
W
21.34-21.58
4.11-4.16
W-M
21.66-21.91
4.05-4.10
M-S
24.04-24.32
3.66-3.70
W-M
24.41-24.65
3.61-3.64
W-M
25.71-25.96
3.43-3.46
W-M.
3. The aluminophosphate molecular sieve according to claim 2 , wherein the molecular sieve has an X-ray diffraction pattern exhibiting a relative intensity profile shown in the following table:
Interplanar spacing
Relative intensity
2 theta (°)
(Å)
(I/I 0 ) × 100
8.20-8.60
10.27-10.77
VS
13.73-13.99
6.32-6.44
VS
13.90-14.20
6.23-6.36
W-M
16.16-16.41
5.39-5.48
W-M
16.36-16.61
5.33-5.41
W-M
17.17-17.42
5.08-5.16
W
19.66-19.91
4.45-4.51
W
21.34-21.58
4.11-4.16
W-M
21.66-21.91
4.05-4.10
M-S
24.04-24.32
3.66-3.70
W-M
24.41-24.65
3.61-3.64
W-M
25.71-25.96
3.43-3.46
W-M
27.85-28.12
3.17-3.20
W-M
28.18-28.43
3.13-3.16
W
29.40-29.66
3.01-3.03
M.
4. The aluminophosphate molecular sieve according to claim 1 , wherein the molecular sieve has a specific surface area of about 150-500 m 2 /g, and a micropore volume of about 0.9-0.25 ml/g.
5. A method for preparing an aluminophosphate molecular sieve according to claim 1 , comprising the steps of:
i) providing an aluminophosphate molecular sieve precursor, wherein the precursor has an X-ray diffraction pattern exhibiting a relative intensity profile as shown in the following table:
2 theta
Interplanar spacing
Relative intensity
(°)
(Å)
(I/I 0 ) × 100
8.20-8.38
10.54-10.77
S-VS
13.40-13.61
6.50-6.60
M-S
15.81-15.99
5.54-5.60
S-VS
16.75-16.97
5.22-5.28
W-M
20.82-21.09
4.21-4.26
S-VS
22.31-22.52
3.94-3.98
S-VS
23.49-23.68
3.75-3.78
M,
and
ii) calcining the aluminophosphate molecular sieve precursor to obtain the aluminophosphate molecular sieve.
6. The method according to claim 5 , wherein the precursor has an X-ray diffraction pattern exhibiting a relative intensity profile as shown in the following table:
2 theta
Interplanar spacing
Relative intensity
(°)
(Å)
(I/I 0 ) × 100
8.20-8.38
10.54-10.77
S-VS
13.40-13.61
6.50-6.60
M-S
15.81-15.99
5.54-5.60
S-VS
16.75-16.97
5.22-5.28
W-M
19.59-19.86
4.46-4.53
W
20.82-21.09
4.21-4.26
S-VS
22.31-22.52
3.94-3.98
S-VS
23.49-23.68
3.75-3.78
M
23.88-24.16
3.65-3.72
W-M
25.15-25.42
3.50-3.54
W-M
25.54-25.82
3.45-3.48
W-M
27.16-27.44
3.25-3.28
W-M
29.54-29.82
2.99-3.02
W-M.
7. The method according to claim 5 , wherein the step i) further comprises:
ia) mixing an aluminum source, a phosphorus source, an organic material R and water at a molar ratio of the aluminum source (calculated as Al 2 O 3 ): the phosphorus source (calculated as P 2 O 5 ):R:H 2 O of about 1:(1.0-3.0):(1.5-6.0):(50-500) to obtain a synthetic mother liquor; and
ib) subjecting the synthetic mother liquor to crystallization to obtain the aluminophosphate molecular sieve precursor,
wherein the organic material R is an ammonium hydroxide having the following formula:
wherein the groups R1-R12, which may be identical or different from each other, are independently selected from H and C 1-6 alkyl groups, and
the groups R13 and R14, which may be identical or different from each other, are independently selected from C 1-6 alkyl groups.
8. The method according to claim 7 , wherein in step ia) the aluminum source, the phosphorus source, the organic material R and water are mixed at a molar ratio of the aluminum source (calculated as Al 2 O 3 ): the phosphorus source (calculated as P 2 O 5 ):R:H 2 O of about 1: (1.0-2.0):(2.5-4.8):(100-300).
9. The method according to claim 7 , wherein the organic material R is 1,1-[1,4-phenylenebis(methylene)]bis-1-methylpyrrolidinium dihydroxide.
10. The method according to claim 7 , wherein step ib) is carried out under the following conditions:
a sealed reaction vessel, a crystallization temperature of about 130-200° C., and a crystallization time of about 24-150.
11. The method according to claim 7 , wherein the aluminum source is one or more selected from the group consisting of pseudo-boehmite, aluminum isopropoxide, aluminum sol, aluminum hydroxide, aluminum sulfate, aluminum chloride and aluminum oxide;
and/or the phosphorus source is one or more selected from the group consisting of phosphoric acid, orthophosphorous acid and phosphorus pentoxide.
12. The method according to claim 5 , wherein the aluminophosphate molecular sieve precursor has a molar ratio of phosphorus, calculated as P 2 O 5 , to aluminum, calculated as Al 2 O 3 , in a range of about 0.8 to about 1.2, and
optionally, the aluminophosphate molecular sieve precursor comprises from about 8 wt % to about 40 wt % of an organic material, based on the weight of the aluminophosphate molecular sieve precursor.
13. A molecular sieve composition comprising an aluminophosphate molecular sieve according to claim 1 , and a binder.
14. A method for treating automobile exhaust gas, comprising contacting a catalyst comprising the aluminophosphate molecular sieve to claim 1 loaded with copper with the automobile exhaust gas to cause decomposition of nitrogen oxides in the automobile exhaust gas.
15. A method for removing water from a water-containing material to be dried, comprising: contacting the molecular sieve composition according to claim 13 with the water-containing material, whereby the molecular sieve composition adsorbs water from the water-containing material, wherein the water-containing material is an organic solvent or natural gas.
16. The aluminophosphate molecular sieve according to claim 4 , wherein the molecular sieve has a specific surface area of about 200-400 m 2 /g; and a micropore volume of about 0.10-0.20 ml/g.
17. The method according to claim 6 , wherein the precursor has an X-ray diffraction pattern exhibiting a relative intensity profile as shown in the following table:
2 theta
Interplanar spacing
Relative intensity
(°)
(Å)
(I/I 0 ) × 100
8.20-8.38
10.54-10.77
S-VS
8.80-9.06
9.75-10.04
W
13.40-13.61
6.50-6.60
M-S
14.13-14.39
6.15-6.26
W
15.81-15.99
5.54-5.60
S-VS
16.75-16.97
5.22-5.28
W-M
19.59-19.86
4.46-4.53
W
20.82-21.09
4.21-4.26
S-VS
21.54-21.84
4.06-4.12
W
22.31-22.52
3.94-3.98
S-VS
23.49-23.68
3.75-3.78
M
23.88-24.16
3.65-3.72
W-M
25.15-25.42
3.50-3.54
W-M
25.54-25.82
3.45-3.48
W-M
26.20-26.41
3.37-3.40
W
27.16-27.44
3.25-3.28
W-M
28.66-28.90
3.08-3.11
W
29.54-29.82
2.99-3.02
W-M.
18. The method according to claim 7 , wherein wherein in the formula of the organic material R, the groups R1-R12, which may be identical or different from each other, are independently selected from from H and C 1-3 alkyl groups; and
the groups R13 and R14, which may be identical or different from each other, are independently selected from C 1-3 alkyl groups.
19. The method according to claim 10 , wherein step ib) is carried out under the following conditions: a sealed reaction vessel, a crystallization temperature of about 145-185° C., and a crystallization time of about 48-120 hours.
20. The method according to claim 11 , wherein the aluminum source is selected from the group consisting of pseudo-boehmite and aluminum isopropoxide; and the phosphorus source is phosphoric acid.Cited by (0)
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